knapSack greedy

loiane · loiane · commit aef7f9294c7d · 2016-03-26T15:41:40.000-03:00
diff --git a/chapter11/07-KnapSackProblemGreedy.html b/chapter11/07-KnapSackProblemGreedy.html
@@ -5,6 +5,6 @@
     <title></title>
 </head>
 <body>
-
+<script src="07-KnapSackProblemGreedy.js"></script>
 </body>
 </html>
diff --git a/chapter11/07-KnapSackProblemGreedy.js b/chapter11/07-KnapSackProblemGreedy.js
@@ -0,0 +1,28 @@
+function knapSack(capacity, values, weights) {
+    var n = values.length,
+        load = 0,
+        i = 0,
+        val = 0;
+
+    for (i=0; i<n && load < capacity; i++) {
+
+        if (weights[i] <= (capacity-load)) {
+            val += values[i];
+            load += weights[i];
+            console.log('using item ' + (i+1) + ' for the solution');
+
+        } else {
+            var r = (capacity-load)/weights[i];
+            val += r * values[i];
+            load += weights[i];
+            console.log('using ratio of ' + r + ' for item ' + (i+1) + ' for the solution');
+        }
+    }
+    return val;
+}
+
+var values = [3,4,5],
+    weights = [2,3,4],
+    capacity = 6,
+    n = values.length;
+console.log(knapSack(capacity, values, weights));
